/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:28:41,754 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:28:41,758 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:28:41,784 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:28:41,785 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:28:41,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:28:41,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:28:41,789 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:28:41,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:28:41,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:28:41,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:28:41,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:28:41,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:28:41,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:28:41,798 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:28:41,799 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:28:41,800 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:28:41,801 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:28:41,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:28:41,805 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:28:41,807 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:28:41,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:28:41,809 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:28:41,810 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:28:41,813 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:28:41,813 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:28:41,813 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:28:41,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:28:41,815 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:28:41,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:28:41,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:28:41,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:28:41,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:28:41,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:28:41,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:28:41,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:28:41,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:28:41,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:28:41,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:28:41,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:28:41,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:28:41,825 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-25 05:28:41,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:28:41,856 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:28:41,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:28:41,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:28:41,861 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:28:41,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:28:41,861 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:28:41,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:28:41,862 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:28:41,862 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:28:41,862 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:28:41,862 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:28:41,862 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:28:41,863 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:28:41,863 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:28:41,863 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:28:41,863 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:28:41,864 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:28:41,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:28:41,866 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:28:41,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:28:41,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:28:41,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:28:41,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:28:41,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:28:41,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:28:41,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:28:41,867 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:28:41,867 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:28:41,868 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:28:42,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:28:42,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:28:42,354 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:28:42,356 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:28:42,357 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:28:42,358 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-09-25 05:28:42,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20e4531b2/ea5352701f3240249a21f28c24526e0a/FLAG814addcc0 [2020-09-25 05:28:42,979 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:28:42,980 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive-simple/id_i5_o5-1.c [2020-09-25 05:28:42,988 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20e4531b2/ea5352701f3240249a21f28c24526e0a/FLAG814addcc0 [2020-09-25 05:28:43,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/20e4531b2/ea5352701f3240249a21f28c24526e0a [2020-09-25 05:28:43,338 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:28:43,344 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:28:43,345 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:28:43,346 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:28:43,350 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:28:43,351 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,356 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c096cad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43, skipping insertion in model container [2020-09-25 05:28:43,356 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,366 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:28:43,390 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:28:43,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:28:43,678 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:28:43,698 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:28:43,715 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:28:43,716 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43 WrapperNode [2020-09-25 05:28:43,716 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:28:43,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:28:43,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:28:43,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:28:43,731 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,737 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,738 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,743 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,744 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... [2020-09-25 05:28:43,746 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:28:43,746 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:28:43,747 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:28:43,747 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:28:43,747 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:28:43,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:28:43,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:28:43,905 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-09-25 05:28:43,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:28:43,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 05:28:43,905 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:28:43,905 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-09-25 05:28:43,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:28:43,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:28:43,906 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:28:44,115 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:28:44,115 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:28:44,126 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:28:44 BoogieIcfgContainer [2020-09-25 05:28:44,126 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:28:44,133 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:28:44,134 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:28:44,146 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:28:44,146 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:28:43" (1/3) ... [2020-09-25 05:28:44,148 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4183dbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:28:44, skipping insertion in model container [2020-09-25 05:28:44,148 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:28:43" (2/3) ... [2020-09-25 05:28:44,150 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4183dbcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:28:44, skipping insertion in model container [2020-09-25 05:28:44,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:28:44" (3/3) ... [2020-09-25 05:28:44,159 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i5_o5-1.c [2020-09-25 05:28:44,191 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:28:44,202 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:28:44,249 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:28:44,284 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:28:44,285 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:28:44,285 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:28:44,285 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:28:44,285 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:28:44,285 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:28:44,286 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:28:44,286 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:28:44,310 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-25 05:28:44,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-25 05:28:44,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:28:44,320 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:28:44,321 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:28:44,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:28:44,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-09-25 05:28:44,337 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:28:44,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [323350991] [2020-09-25 05:28:44,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:28:44,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:44,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:44,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:44,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 05:28:44,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:28:44,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-09-25 05:28:44,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:44,700 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 05:28:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-09-25 05:28:44,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 05:28:44,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:28:44,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:28:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:44,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:44,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:44,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:28:44,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:44,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 05:28:44,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:44,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:28:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:44,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:28:44,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:44,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:28:44,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:44,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:44,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:44,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:28:44,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:44,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 05:28:44,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:44,798 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:44,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:28:44,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:44,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:28:44,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:28:44,836 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [323350991] [2020-09-25 05:28:44,838 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:28:44,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:28:44,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169825336] [2020-09-25 05:28:44,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:28:44,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:28:44,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:28:44,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:28:44,865 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-09-25 05:28:44,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:28:44,967 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-09-25 05:28:44,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:28:44,969 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-25 05:28:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:28:44,983 INFO L225 Difference]: With dead ends: 37 [2020-09-25 05:28:44,983 INFO L226 Difference]: Without dead ends: 23 [2020-09-25 05:28:44,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:28:45,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-25 05:28:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-09-25 05:28:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-25 05:28:45,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-09-25 05:28:45,046 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-09-25 05:28:45,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:28:45,047 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-09-25 05:28:45,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:28:45,047 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-09-25 05:28:45,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 05:28:45,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:28:45,050 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:28:45,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:28:45,051 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:28:45,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:28:45,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-09-25 05:28:45,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:28:45,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082988342] [2020-09-25 05:28:45,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:28:45,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:45,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:45,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:45,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:45,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 05:28:45,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:28:45,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 459 [2020-09-25 05:28:45,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:45,528 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 05:28:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-09-25 05:28:45,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-25 05:28:45,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:45,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:28:45,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:45,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:45,560 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:45,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:28:45,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:45,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 05:28:45,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:45,561 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:45,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:28:45,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:45,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:28:45,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:45,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:28:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:45,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:45,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:45,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 05:28:45,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:45,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-25 05:28:45,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:45,656 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:45,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:28:45,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:45,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:28:45,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:45,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:45,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:45,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:45,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:45,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:28:45,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:45,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-25 05:28:45,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:45,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:45,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:28:45,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:45,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:28:45,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:45,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-25 05:28:45,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082988342] [2020-09-25 05:28:45,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:28:45,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 05:28:45,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744675657] [2020-09-25 05:28:45,770 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 05:28:45,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:28:45,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 05:28:45,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 05:28:45,774 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 7 states. [2020-09-25 05:28:45,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:28:45,882 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-09-25 05:28:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 05:28:45,883 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-25 05:28:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:28:45,884 INFO L225 Difference]: With dead ends: 34 [2020-09-25 05:28:45,884 INFO L226 Difference]: Without dead ends: 28 [2020-09-25 05:28:45,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:28:45,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-25 05:28:45,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-09-25 05:28:45,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-25 05:28:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-09-25 05:28:45,893 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-09-25 05:28:45,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:28:45,894 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-09-25 05:28:45,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 05:28:45,894 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-09-25 05:28:45,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-25 05:28:45,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:28:45,896 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:28:45,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:28:45,896 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:28:45,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:28:45,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1463730447, now seen corresponding path program 2 times [2020-09-25 05:28:45,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:28:45,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2036699933] [2020-09-25 05:28:45,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:28:45,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:45,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:46,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:46,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-25 05:28:46,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:28:46,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 538 [2020-09-25 05:28:46,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:46,448 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 05:28:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-09-25 05:28:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-25 05:28:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:46,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:28:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:46,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:46,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:46,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:28:46,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:46,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 05:28:46,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:46,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:28:46,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:46,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:28:46,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:46,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:28:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:46,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:46,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:46,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 05:28:46,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:46,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-09-25 05:28:46,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:46,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:46,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:28:46,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:46,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 05:28:46,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:46,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:46,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:46,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:46,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:46,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 05:28:46,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:46,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 05:28:46,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:46,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:28:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:46,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:28:46,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:46,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:46,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:46,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:46,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:28:46,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:46,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-25 05:28:46,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:46,654 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:46,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:28:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:46,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:28:46,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:46,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-09-25 05:28:46,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2036699933] [2020-09-25 05:28:46,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:28:46,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 05:28:46,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221455541] [2020-09-25 05:28:46,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 05:28:46,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:28:46,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 05:28:46,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 05:28:46,677 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 9 states. [2020-09-25 05:28:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:28:46,763 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-09-25 05:28:46,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 05:28:46,764 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 32 [2020-09-25 05:28:46,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:28:46,765 INFO L225 Difference]: With dead ends: 39 [2020-09-25 05:28:46,766 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 05:28:46,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-25 05:28:46,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 05:28:46,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-09-25 05:28:46,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 05:28:46,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 05:28:46,774 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2020-09-25 05:28:46,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:28:46,774 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 05:28:46,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 05:28:46,774 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 05:28:46,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-25 05:28:46,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:28:46,776 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:28:46,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:28:46,777 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:28:46,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:28:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 23346727, now seen corresponding path program 3 times [2020-09-25 05:28:46,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:28:46,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [280033391] [2020-09-25 05:28:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:28:46,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:46,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:46,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:47,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:47,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-25 05:28:47,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:28:47,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 878 [2020-09-25 05:28:47,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:47,667 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 05:28:47,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-09-25 05:28:47,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 05:28:47,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:28:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:47,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:47,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:47,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:28:47,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:47,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:28:47,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:47,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:28:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:47,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:28:47,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:28:47,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:28:47,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:47,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:47,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:47,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 05:28:47,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:47,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-09-25 05:28:47,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:47,853 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 05:28:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:47,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 05:28:47,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:47,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:47,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:47,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:47,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 05:28:47,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:47,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-25 05:28:47,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:47,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:28:47,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:47,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 05:28:47,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:48,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:48,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:48,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:48,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:48,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 05:28:48,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:48,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 05:28:48,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:48,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:48,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:28:48,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:48,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:28:48,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:48,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:48,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:48,106 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:28:48,106 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:48,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-25 05:28:48,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:48,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:28:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:28:48,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-25 05:28:48,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [280033391] [2020-09-25 05:28:48,135 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:28:48,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 05:28:48,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691701238] [2020-09-25 05:28:48,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 05:28:48,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:28:48,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 05:28:48,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 05:28:48,138 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-09-25 05:28:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:28:48,253 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-09-25 05:28:48,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 05:28:48,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 40 [2020-09-25 05:28:48,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:28:48,256 INFO L225 Difference]: With dead ends: 44 [2020-09-25 05:28:48,257 INFO L226 Difference]: Without dead ends: 38 [2020-09-25 05:28:48,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-25 05:28:48,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-25 05:28:48,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-09-25 05:28:48,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 05:28:48,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-09-25 05:28:48,272 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 40 [2020-09-25 05:28:48,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:28:48,276 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-09-25 05:28:48,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 05:28:48,276 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-09-25 05:28:48,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-25 05:28:48,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:28:48,278 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:28:48,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:28:48,279 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:28:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:28:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash -649675855, now seen corresponding path program 4 times [2020-09-25 05:28:48,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:28:48,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550750987] [2020-09-25 05:28:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:28:48,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:48,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:48,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:49,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:49,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-25 05:28:49,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 05:28:49,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1433 [2020-09-25 05:28:49,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:49,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 05:28:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-09-25 05:28:49,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-25 05:28:49,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:28:49,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:28:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:49,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:49,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:49,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 05:28:49,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:49,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 05:28:49,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:49,764 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:49,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:28:49,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:49,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:28:49,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:49,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-09-25 05:28:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:49,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:49,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:49,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 05:28:49,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:49,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 171 [2020-09-25 05:28:49,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:49,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-25 05:28:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:49,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-25 05:28:49,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:49,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:49,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:50,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:50,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-25 05:28:50,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:50,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-25 05:28:50,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:50,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 05:28:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:50,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-25 05:28:50,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:50,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:50,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:50,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:50,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:50,262 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 05:28:50,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-25 05:28:50,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:50,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:50,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 05:28:50,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:50,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 05:28:50,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 05:28:50,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:50,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:50,354 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:50,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-25 05:28:50,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:50,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-09-25 05:28:50,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:50,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:50,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 05:28:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:50,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 05:28:50,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-25 05:28:50,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-09-25 05:28:50,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:28:50,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:28:50,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:28:50,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 05:28:50,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:28:50,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-09-25 05:28:50,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:28:50,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:28:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:28:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:28:50,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 05:28:50,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:28:50,479 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-25 05:28:50,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550750987] [2020-09-25 05:28:50,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 05:28:50,481 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 05:28:50,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239028577] [2020-09-25 05:28:50,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 05:28:50,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:28:50,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 05:28:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-25 05:28:50,483 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 13 states. [2020-09-25 05:28:50,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:28:50,633 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-09-25 05:28:50,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 05:28:50,633 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 48 [2020-09-25 05:28:50,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:28:50,635 INFO L225 Difference]: With dead ends: 49 [2020-09-25 05:28:50,635 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 05:28:50,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-09-25 05:28:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 05:28:50,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-09-25 05:28:50,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-25 05:28:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-09-25 05:28:50,654 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 48 [2020-09-25 05:28:50,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:28:50,655 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-09-25 05:28:50,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 05:28:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-09-25 05:28:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-25 05:28:50,660 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:28:50,660 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:28:50,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 05:28:50,660 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:28:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:28:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash 899977063, now seen corresponding path program 5 times [2020-09-25 05:28:50,665 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:28:50,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137240992] [2020-09-25 05:28:50,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:28:50,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 05:28:50,680 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 05:28:50,680 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 05:28:50,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 05:28:50,715 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 05:28:50 BoogieIcfgContainer [2020-09-25 05:28:50,715 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 05:28:50,719 INFO L168 Benchmark]: Toolchain (without parser) took 7376.96 ms. Allocated memory was 141.6 MB in the beginning and 271.1 MB in the end (delta: 129.5 MB). Free memory was 105.3 MB in the beginning and 134.0 MB in the end (delta: -28.7 MB). Peak memory consumption was 100.8 MB. Max. memory is 7.1 GB. [2020-09-25 05:28:50,721 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 05:28:50,722 INFO L168 Benchmark]: CACSL2BoogieTranslator took 371.02 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 95.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-09-25 05:28:50,728 INFO L168 Benchmark]: Boogie Preprocessor took 29.47 ms. Allocated memory is still 141.6 MB. Free memory was 95.5 MB in the beginning and 94.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-09-25 05:28:50,730 INFO L168 Benchmark]: RCFGBuilder took 380.23 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 94.1 MB in the beginning and 170.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-09-25 05:28:50,731 INFO L168 Benchmark]: TraceAbstraction took 6582.04 ms. Allocated memory was 202.9 MB in the beginning and 271.1 MB in the end (delta: 68.2 MB). Free memory was 170.1 MB in the beginning and 134.0 MB in the end (delta: 36.1 MB). Peak memory consumption was 104.2 MB. Max. memory is 7.1 GB. [2020-09-25 05:28:50,743 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 123.1 MB in the beginning and 122.9 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 371.02 ms. Allocated memory is still 141.6 MB. Free memory was 104.6 MB in the beginning and 95.5 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.47 ms. Allocated memory is still 141.6 MB. Free memory was 95.5 MB in the beginning and 94.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 380.23 ms. Allocated memory was 141.6 MB in the beginning and 202.9 MB in the end (delta: 61.3 MB). Free memory was 94.1 MB in the beginning and 170.7 MB in the end (delta: -76.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6582.04 ms. Allocated memory was 202.9 MB in the beginning and 271.1 MB in the end (delta: 68.2 MB). Free memory was 170.1 MB in the beginning and 134.0 MB in the end (delta: 36.1 MB). Peak memory consumption was 104.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 5; [L11] CALL, EXPR id(input) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND FALSE !(x==0) [L6] CALL, EXPR id(x-1) [L5] COND TRUE x==0 [L5] return 0; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L6] RET, EXPR id(x-1) [L6] return id(x-1) + 1; [L11] RET, EXPR id(input) [L11] int result = id(input); [L12] COND TRUE result == 5 [L13] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.4s, OverallIterations: 6, TraceHistogramMax: 6, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 95 SDtfs, 20 SDslu, 460 SDs, 0 SdLazy, 159 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=43occurred in iteration=5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 5.3s InterpolantComputationTime, 216 NumberOfCodeBlocks, 216 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 155 ConstructedInterpolants, 0 QuantifiedInterpolants, 11389 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 50/120 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...